FOSSIL- AND EMISSION-FREE BUILDING SITES Guide to arranging fossil- and emission-free solutions on building sites Energy Norway, the Norwegian District Heating Organization, ENOVA, the Federation of Norwegian Construction Industries (BNL), the Norwegian Contractors Association Oslo, Akershus and Østfold (EBAO), Climate Agency, City of Oslo and Nelfo Report no.: 2018-0418, Rev. 2-ENG Document no.: 10074377-1 Date: 2018-05-11
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FOSSIL- AND EMISSION-FREE BUILDING SITES
Guide to arranging fossil- and
emission-free solutions on building sites Energy Norway, the Norwegian District Heating
Organization, ENOVA, the Federation of Norwegian Construction Industries (BNL), the Norwegian Contractors Association Oslo, Akershus and Østfold (EBAO), Climate Agency, City of Oslo and Nelfo
Report no.: 2018-0418, Rev. 2-ENG
Document no.: 10074377-1
Date: 2018-05-11
1
Project name: FOSSIL- AND EMISSION-FREE BUILDING
SITES
DNV GL AS Energy
Title of report: Guide to arranging fossil- and emission-free
solutions on building sites
Energy Markets & Technology P.O.
Box 300
Developers: Energy Norway, the Norwegian District
Heating Organization, ENOVA, the Federation
of Norwegian Construction Industries (BNL),
the Norwegian Contractors Association Oslo,
Akershus and Østfold (EBAO), Climate
Agency, City of Oslo and Nelfo
Postboks 7184 Majorstua
0307 OSLO
Norway
1322 Høvik
Norway
Tel: +47 67 57 99 00
Contact person: Trygve Mellvang-Berg
Date: 2018-05-11
Org. unit: Energy Markets & Technology
Report no.: 2018-0418, Rev. 2-ENG
Document no.: 10074377-1
The delivery of this report is subject to the provisions in relevant contract(s):
Definition of emission-free and fossil-free alternatives
FOSSIL-FREE AND EMISSION-FREE ALTERNATIVES DURING THE CONSTRUCTION PERIOD ......................................................................................................................... 9
2.1 Heating and drying out 9
2.2 Construction machinery 12
3 THE GUIDE .................................................................................................................. 15
3.1 Action points in step 3: adapting the chosen concept 16
3.2 Action points in Step 4: detailed planning 18
3.3 Action points in Step 5: production and deliveries 23
ANNEX 1: GUIDE FOR FOSSIL- AND EMISSION-FREE BUILDING SITES............................................. 28
ANNEX 2: INTERVIEW LIST ......................................................................................................... 30
ANNEX 3: PARTICIPANTS AT THE WORKSHOP ON 28.02.2018 ......................................................... 31
ANNEX 4: AGENDA FOR THE WORKSHOP ON 28.02.2018 ............................................................... 32
3
SUMMARY Currently, building sites in Norway mainly use fossil energy sources. In the past few years, this has
received increased attention due to a desire to reduce greenhouse gas emissions and local air pollution.
DNV GL has prepared a guide to arranging for the use of fossil- and emission-free alternatives on
building sites on behalf of Energy Norway, the Norwegian District Heating Organization, ENOVA, the
Federation of Norwegian Construction Industries (BNL), the Norwegian Contractors Association Oslo,
Akershus and Østfold (EBAO), Climate Agency, City of Oslo and Nelfo.
The guide focuses on what should be done differently in the building process when using fossil-free
and/or emission-free alternatives compared to when using conventional technology. It is designed as a
checklist and points out the action points where the building process is different from that on a
traditional building site. The action points shed light on what is required to arrange for the use of
fossil-free and emission-free heating solutions, construction machinery and equipment on building sites. The structure of the guide agrees with the steps in the general outline of the building process, which
consists of eight steps. This guide only deals with steps 3 to 5.
General outline of the building process according to the "Next Step" phase standard /D09) – this guide deals with steps 3 to 5
In Step 3, the chosen concept is adapted and this is the first time there is sufficient information on the
project (for example, where the new building is to be located) for it to be relevant to plan for a fossil-
free or emission-free building site. In Step 6, the building is put into operation, and the building site is
thus closed down.
For steps 3 to 5 in the building process, there are specified action points that it is important to take into
consideration when working towards a fossil-free or emission-free building site. Each action point has an
ID according to the step to which it belongs: "A" for step 3: adapting the chosen concept, "D" for step 4:
detailed planning and "P" for step 5: production and deliveries. More detailed sub-points are specified
under each action point on level 1 (for example, A1 or P2). The relevant parties are listed on the right in
the guide: developer, contractor, subcontractor, DSO1, district heating company and fuel supplier. The
parties' roles are specified here for each action point.
1 Distribution System Operator
4
r - responsible e - executes c - to be consulted i - to be informed d - decides
Develo
per
Contra
cto
r
Subcontra
cto
r
DSO
Dis
trict h
eatin
g c
o.
Fuel s
upplie
r
Step 3: ADAPTING THE
CHOSEN CONCEPT
A1. Estimate the building's electric power and heat demand when in operation
r
A2 Find out what fossil-free and emission-free alternatives are available at the building site in question
r c c c c
A3. Find out the existing alternatives for reducing the building site's energy demand
r c c
Step 4: DETAILED PLANNING
D1. In the invitation to tender, stipulate realistic requirements for the use of fossil-free and emission-free alternatives at the building site
r c c
D2. Map the energy and power demand i r c
D3. Plan the creation of infrastructure up to the building site i r c c c i
D4. Ensure that the logistics at the building site are adapted to the use of fossil-free and emission-free alternatives
i r i c c c
Step 5: PRODUCTION
AND DELIVERIES
P1. Logistics and execution plan r e
P2. Measuring and reporting energy usage for continuous learning
r e i c c c
This report is intended to provide more detailed background information and a framework for the guide.
Chapter 1 provides an introduction in which the method as well as limitations and definitions are
described. Chapter 2 describes fossil-free and emission-free alternatives during the building period,
chapter 3 provides in-depth information on the guide's structure and contents, chapter 4 provides
perspectives on developments in the area in the short and long term, while chapter 5 describes the road
ahead in the work to achieve emission-free building sites in Norway.
5
1 INTRODUCTION
DNV GL has prepared a guide for arranging for the use of fossil-free and emission-free alternatives at
building sites on behalf of Energy Norway, the Norwegian District Heating Organization, ENOVA, the
Federation of Norwegian Construction Industries (BNL), the Norwegian Contractors Association Oslo,
Akershus and Østfold (EBAO), Climate Agency, City of Oslo and Nelfo.
Currently, Norwegian building sites mainly use fossil energy sources. In the past few years, this has
attracted more attention due to a desire to lessen greenhouse gas emissions and local air pollution.
We would like this guide to help reduce emissions on building sites by facilitating the increased use of
energy solutions based on electricity, district heating and other non-fossil solutions as well as the
implementation of energy efficiency improvement measures. The goal has been to establish a practical and usable guide. The guide's focus is therefore on what
should be done differently during the building process when using fossil-free and/or emission-free
alternatives compared to when using conventional technology. It is formed as a checklist and points out
the action points where the building process is different from that on a traditional building site. The
action points shed light on what is required in order to arrange for the use of fossil-free and emission-
free heating solutions, construction machinery and equipment on building sites. This report is intended to provide more detailed background information and a framework around the
guide. The method, limitations and definitions are described further on in this chapter. Chapter 2
describes fossil-free and emission-free alternatives during the building period, chapter 3 provides in-
depth information on the guide's structure and contents, chapter 4 provides perspectives on
developments in this area in the short and long term, while chapter 5 discusses the road ahead in the
work of achieving emission-free building sites in Norway.
1.1 Method
The guide has been prepared in close contact with relevant parties. During the project, interviews/talks
have been held with 25 parties representing developers, contractors, suppliers, district heating
companies and DSOs. An open workshop with representatives of the above interested parties and
affected organizations has also been held. An overview of the interviews held and workshop participants
is included in annexes 2 and 3.
Through the interviews and workshop, several action points and subpoints have been identified and
these are linked to steps in the building process. For a general outline of the building process, the steps
in the phase standard "Neste Steg" (Next Step) /D09/ have been used, illustrated in Figure 1. The
resulting checklist, with action points and subpoints linked to the steps to which they belong, makes up
the actual guide.
6
Figure 1. General outline of the building process according to the phase standard "Neste Steg"
(Next Step) /D09/ - this guide deals with steps 3 to 5
This guide only deals with steps 3 to 5, see Figure 1. In Step 3, the chosen concept is adapted and this is
the first time there is sufficient information on the project (for example, where the new building is to be
located) for it to be relevant to plan for a fossil-free or emission-free building site. In step 6, the building
is put into operation and the building site is therefore wound up.
Below is a brief description of the steps in the building process according to the "Next Step" phase
standard – for a more detailed description, refer to the Veileder for fasenormen «Neste Steg» (Guide to
the "Next Step" phase standard) /D09/.
Step 1 – Strategic definition: identify the reason, general goals and frameworks for the measure (i.e.
new building). The typical output of this step is recognition of the user's need for a measure and a
justified assessment of whether it is commercially sensible to examine the measure with a view to
implementing it.
Step 2 – Programme and concept development: ascertain whether the measure is feasible and
decide which solution in principle is most expedient. The typical output is a conclusion of if the measure
is feasible, an assessment of which concept (solution in principle) best satisfies the owner's business
plan and the users' needs, and a decision on whether to go further and which concept is to be developed.
Step 3 – Adapting the chosen concept: develop the principles for a technical solution, realistic
strategies and plans for the measure so that a final decision on implementation can be made on the
correct basis. The typical output of this step is the final scope for the solution (functions and areas), a
specific execution plan and a cost estimate (acctual budget), including a final decision to finance and
carry out the project.
Step 4 – Detailed planning: develop a sufficiently detailed and quality assured work basis so that safe
and proper execution is possible. The typical output of this step is a correct, agreed-on basis for
producing the measure to the right quality and according to schedule, as well as a sufficiently detailed
execution plan. In a construction subcontract, the tender documents are created as a description and
drawings that the contractors assign a price to. In a Engineering, Procurement and Construction (EPC)
contract, the responsibility for this is assigned to the turnkey contractor.
Step 5 – Production and deliveries: complete the delivery (the building) in accordance with plans and
intentions, safely and with the correct workmanship/design. The project execution is to be built on the
basis created by advisors – subject to either the developer or the contractor.
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Step 6 – Hand-over and use: hand over a flawless project and ensure that all the systems are
correctly adjusted for their intended use.
Step 7 – Use and management: ensure technically good and economical operations that meet the
needs of the project's user and provide the intended effect.
Step 8 – Decommissioning: the sale of the building, or termination of the building's period of use
(demolition).
1.2 Scope
The guide and report focus on activities that lead to energy usage and emissions at the building site.
This includes the use of heating, construction machinery and any other equipment. In addition, there is a
focus on the infrastructure necessary for arranging the use of emission- and fossil-free heating solutions
and machinery.
The transport of masses, materials, machinery, persons, etc, to and from the building site and the
energy usage and emissions linked to the production of materials and other activities outside the actual
building site are not covered by this project. Figure 2 illustrates the guide's focus area, i.e. the activities
linked to the building site on which the guide focuses.
Figure 2. Illustration of the guide's focus area – within the area marked in green.
The report does not discuss or consider emission factors linked to the use of various energy carriers. A
more detailed discussion relating to the environmental and ethical aspects of using biodiesel is
mentioned by several parties. However, it is not within the scope of this assignment to discuss this in
any further detail.
The guide is practically oriented, with an overview of what should be implemented in order to make
conditions suitable for fossil- and emission-free alternatives. Cost/benefit assessments or other
assessments linked to the use of emission-free alternatives or introduction of emission requirements on
building sites are not covered by this project.
1.3 Definition of emission-free and fossil-free alternatives
The concepts of emission-free and fossil-free have to some extent been used interchangeably when
talking about emissions from building sites. A definition of the meaning of these concepts in this context
is therefore provided here:
- An emission-free building site entails the use of energy sources that do not lead to local emissions of
CO2e or NOx at the building site. Emission-free heating alternatives include heating based on
Heating Construction
machinery
Construction machinery, equipment and infrastructure
infrastruktur
Transport
Waste disposal
and treatment
Production of
material
8
electricity, district heating and other energy carriers that do not lead to local emissions of CO2e or
NOx at the building site. Emission-free alternatives when using construction machinery include
battery-electric machinery and electric machinery connected directly to the power grid (electric-cable
construction machinery). In the longer term, other emission-free alternatives may be developed to
replace or supplement the emission-free alternatives mentioned above.
- A fossil-free building site entails the use of emission-free machinery and solutions, and in addition
allows the use of sustainable bioenergy and biofuels.
9
2 FOSSIL-FREE AND EMISSION-FREE ALTERNATIVES DURING THE CONSTRUCTION PERIOD
This chapter discusses the existing alternatives to the use of fossil energy at the building site. Table 1
provides an overview of fossil-free and emission-free heating and construction-machinery alternatives.
The various fuel alternatives listed in the table below can also be combined.
Table 1. Fossil-free and emission-free alternatives at the building site
Alternative Fuel / energy source Heating Construction
machinery
Fossil-free Pellets x
Biofuel x x
Emission-free District heating x
Electricity x x
Geothermal heating x
Hydrogen*
Other Energy efficiency x x
*Not commercially available today
With the exception of hydrogen, the alternatives are commercially available technologies already used in
building projects today. Some of the alternatives, such as district heating, are only available in areas
where a district-heating infrastructure has been built or there are plans to establish district heating,
while for example electricity, pellets and biodiesel are solutions that are available nationwide. Given the
accessibility of sustainable biofuels, it should be possible to meet a requirement of a fossil-free building
site throughout Norway.
The alternatives are described in more detail below.
2.1 Heating and drying out
Temporary heating and drying out at the building site is often called building heat. Building heat is used
to heat up interiors and dry out moisture, to set concrete, to heat up facades and for defrosting/frost
protection. At present, diesel and propane are the two energy sources mainly used for heating. In
connection with heating of interiors, electricity and district heating are also used to a considerable extent,
while pellets and biofuel are used to some extent.
Heating and drying out at the building site can be divided into three activities: 1) heating when laying a
concrete deck at the building site (concrete hardening), 2) facade heating and 3) interior heating.
Heating at the building site is used to dry out materials and to achieve a satisfactory temperature when
it is too cold outside to carry out necessary work. The need for heating is thus highly dependent on the
outdoor temperature. In general, it can be said that the need for heating is restricted to the period from
November until the end of March. At other times of the year, the need for heating is limited or non-
existent.
2.1.1 Fossil-free heating
Fossil-free heating alternatives include bio-based energy sources such as pellets and biofuels (e.g.
bioethanol, biodiesel, HVO100 or biogas).
Pellets
Pellets can be used to heat and dry out a building, but is also very suitable for point heating for
defrosting/frost-protection purposes, for example. A pellet-based heating solution is in theory available
10
throughout Norway. Due to the limited capacity, it is an advantage to order in advance as there may be
a waiting period for deliveries.
The flexibility of pellet-based heating solutions is very similar to that of current hot-air heating systems.
Interviews have shown that pellets are a cheaper solution than a hot-air heating system (using diesel
without road tax). The cost linked to equipment (cost of capital) is higher, but the actual operating costs
are lower. Due to the relatively high cost of capital, pellets are a solution that is from a cost perspective
most suitable for heating over longer periods (2-3 months or more).
A pellet-based heating solution is a relatively small system that does not require much space. However,
there is a need to plan the location of pellet containers for filling purposes. It is important that the
container is located close to the filling site.
Biofuel
Biofuel (bioethanol, biodiesel, HVO100 or biogas) may be used as alternatives to fossil fuels for heating
and drying out at building sites. Biofuel, in the form of HVO100, is available throughout Norway but
there may be availability problems due to the high demand. When using a biofuel, it is important that it
is sustainable, i.e. meets the EU sustainability criteria, and that biofuel made from palm oil and bi-
products of the palm oil industry are avoided.
In 2017, the world's largest liquefied biogas (LBG) facility was established at Skogn in Levanger, Norway.
Biogas is thus available in Norway and can potentially replace the use of propane at building sites. So far,
no technical solutions for this are available on the market /D10/.
2.1.2 Emission-free heating
Alternative energy carriers to ensure emission-free heating and drying out at the building site include
district heating, geothermal heating and electricity.
District heating
A district heating facility is in practice a central heating facility that supplies a city district or several
buildings with energy for hot water and heating. The facility uses various energy sources, ranging from
industrial waste heat to waste heat from the incineration of refuse, heat pumps, bioenergy, etc, to heat
water. In Norway today, district heating has been built or is being built in 92% of all towns with more
than 10,000 inhabitants. /D02/ Municipalities can stipulate a duty for new buildings to be connected to
the local district heating network. Whether or not there is a duty to connect and the floor spaces that
apply therefore vary from municipality to municipality.
District heating may be used for heating and drying out at the building site. However, it is normal for
new buildings to be connected to the district heating network after they have been built. If the building is
instead connected at the beginning of the building process, the district heating can be used at that time
too. Heating and drying out can be carried out either by using the building's future permanent facility or
by connecting mobile units directly to the district heating intake in the building /D03/.
In order to use district heating during the building period, it is important that contact between the
contractor and the district heating company is established at an early stage, as to clarify the required
power and potential need for new infrastructure. Experience has shown that the contractor and district
heating company can find solutions together if they have a good dialogue. The contractor may be
cautious about doing this if it has not used district heating before and has no experience of it. Interviews
have shown that contractors which have used district heating before often want to use it again.
Interviews also show that, in most cases, it is not a problem for the district heating company to deliver
the power required. District heating is more efficient than hot-air heating systems and experience shows
11
that the power used is less than what is available. If there is a need for point heating at some location,
there may be a need for extra power/heating.
Planning is essential, for example technical rooms should be located as close to the heating pipes as
possible and pipes and hoses should be located such that any unwanted stoppage due to damage/a leak
or a necessary move is prevented. It is important to clarify whether a permanent heating plant or mobile
units are to be used. If district heating is used during the construction period, there is a risk that
dirt/sediments will enter the permanent solution, so it is important to use a filter on the heat exchanger.
It is important to be aware that the use of a permanent heat exchanger may in some cases affect the
equipment's guarantee period, so that this is to be considered and evaluated before implementing the
solution.
Geothermal heating and heat pumps
Geothermal heating is obtained by utilizing heat stored in rocks, earth or ground water. A heating plant
extracts the heat stored in the ground via energy wells. An energy well is usually a borehole with a
diameter of around 14cm and a depth of 80-200m. Anti-freeze liquid circulates in plastic tubing in the
borehole and brings up energy which is extracted in a heat pump. /D04/
The parties we interviewed have little experience of geothermal heating, but this is regarded as an
alternative that can also be used during the construction period. If geothermal heating is to be used
during the construction period, the energy wells' location must be given careful consideration. In the
same way as for district heating, it is important that technical rooms are located as close to the heating
pipes as possible and that pipes and hoses are situated such that an unwanted stoppage due to
damage/a leak or a necessary move is prevented.
Heat pump alternatives, such as air-to-air heat pumps or air-to-water heat pumps, can also be
considered for heating during the construction period - especially if use of these energy solutions is
planned once the building is in operation.
Electricity
Electricity can be used as an energy source for heating and drying out at the building site. The building
site is connected to the power grid via a temporary facility, such as a temporary substation, that allows
electricity to be obtained from the grid owner during the construction period.
If electricity is to be used at the building site, it is important that contact with the local DSO is
established as early as possible, so that arrangements can be made for power and infrastructure to be
available at the building site.
The opportunity to use electricity may be restricted by the power available, i.e. the volume of electricity
that can be delivered without the electricity grid having to be upgraded, leading to high costs being
incurred (construction contribution). Interviews and experience of using electricity at building sites
indicate that, in the vast majority of cases, the building's power demand when in operation is sufficient
to cover the building site's power demand for both heating and the operation of electrical construction
machinery. Ambitions for a more energy-efficient building may increase the risk of the building's power
demand when in operation not meeting the building site's power demand.
If there are restrictions on the available power, or there is a desire to avoid overdimensioning a system
that is to be used when the building is in operation, then mobile batteries may be a solution. In the
longer term, several parties point to electricity storage using hydrogen as an energy carrier being a
possibility.
12
2.2 Construction machinery
The use of construction machinery varies widely from building project to building project – from projects
with simple ground conditions that only require a couple of excavators for a few months to projects that
also require machinery to move earth, piling, etc. A project's level of complexity considerably affects the
energy usage and emissions of construction machinery at the building site. Today, diesel is the main
energy source used as fuel for construction machinery. Below, available fossil-free and emission-free
alternatives are described.
2.2.1 Fossil-free construction machinery
Fossil-free construction machinery includes construction machinery that uses biofuels such as bioethanol,
biodiesel, HVO100 or biogas.
Experience of fossil-free building sites obtained from interviews shows that almost all types of machinery
are available for the use of HVO100. Mobile cranes appear to be the only machinery not approved for the
use of biodiesel (HVO100). Table 2 provides an overview of available types of machinery that can use
HVO100.
Table 2. Overview of available types of machinery that can use HVO
Machine types Producer Availability in Norway Supplier
All machines newer than 20 years Caterpillar Yes Pon Equipment
All machines Volvo Yes Volvo Maskin AS
Limited Hitachi Yes Nasta
Technologically, it is therefore not difficult to use fossil-free construction machinery. Other challenges
may be the availability of biofuels that meet EU sustainability criteria (with requirements as to climate
benefit and area usage). To control the use of fuels, it is possible to establish a biofuel tank at the
building site that all parties must fill from. Another alternative may be for subcontractors to document
their usage by, for example, filling receipts.
2.2.2 Emission-free construction machinery
Electric construction machinery is emission-free construction machinery. In the future, there may also be
construction machinery that uses hydrogen as an energy carrier. Interviews and experience of using
electricity at building sites indicate that, in the vast majority of cases, the building's power requirement
when in operation is sufficient to meet the building site's power requirement for both heating and the
operation of electric construction machinery.
Currently, electric-cable construction machinery is available in all machine categories, while hybrid and
battery-electric solutions are only available for small machinery categories. In Norway, the number of
available electric construction machines is limited. There is a need to plan and order these at an early
stage to ensure access to the electric machines that are on offer, and it may even be necessary to hire
for a few extra months to ensure access to this machinery. If demand increases, then the supply will also
increase.
Table 3 and Table 4 show an overview of the available hybrid and battery-electric construction
machinery. The overview does not give a complete list of electric-cable construction machinery, if asked
for, they are already available in all machine categories. Electric-cable construction machinery is used in,
for instance, mines, mountain facilities and when building tunnels.
13
Table 3. Overview of hybrid construction machinery
Machine category Model
Battery/ cable Producer
Lifting capacity (tonn)
Oper-ating time
Availability in Norway
Supplier /rental firm
Excavator < 75 kW
803 dual power Battery Wacker Neuson
1 Yes Utleiersenteret
Excavator < 75 kW
803 dual power Battery Wacker Neuson
1 Yes Cramo
Excavator < 75 kW
803 dual power Battery Wacker Neuson
1 Yes Wacker Neuson AS
Excavator > 75 kW
HB215LC-2 Hybrid
Battery Komatsu 23 Yes Hesselberg
Excavator > 75 kW
HB365LC/NLC-3 Hybrid
Battery Komatsu 37 Yes Hesselberg
Table 4. Overview of battery-electric construction machinery
Machine category Model
Battery/ cable Producer
Lifting capacity (tonn)
Oper-ating time
Availability in Norway Supplier /rental firm
Mining loader
Scooptram ST14 Battery
Battery Epiroc/Atlas Copco
14 No Epiroc Norge AS/Atlas Copco Norge AS
Loader Avant e6 Battery Avant < 1.4 2-6 h Yes Felleskjøpet Maskin BA
Loader Kramer 5055e
Battery Wacker Neuson
< 2.5 5 h Yes Wacker Neuson AS
Excavator < 75 kW
TB216E Battery Suncar HK 2 "One workday"
No Huppenkothen
Excavator < 75 kW
TB1140E Battery Suncar HK 16 "One workday"
No Huppenkothen
Dumper DT10e Battery Wacker Neuson
<0.9 8 h Yes Wacker Neuson AS
Dumper TCH-R800 FED
Battery Messersi 0.8 4.5 h Yes Thor Heldal AS
Dumper 600WS Battery Fort 0.6 6 h Yes Maskin Importøren AS
Dumper BendI E 450 Battery TUFFTRUK 0.45 4 h Yes Limaco AS
Ideas for the guide and proposed measures to arrange for fossil-free
and emission-free building sites
11.30 – 12 noon: Simple lunch
12 noon – 12.50pm: A review of the group work and a discussion
12.50pm – 1pm: Conclusion and the road ahead
Trygve Mellvang-Berg, the Norwegian District Heating Organization,
on behalf of the project group
33
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